Automatic closure device for the discharge of a foam product from a

Abstract

An automatic closure device for use in combination with a pressurized container which has a liquid or pasty filling dischargeable as a foam, as well as a propellant, and comprises a valve spring-biassed into the closed position is described, which closure device comprises an actuator head having a discharge orifice, a discharge duct in the actuator head which duct connects the discharge orifice with an entry port, remote from the orifice, in the actuator head and serving for connecting the latter to an outlet opening of the container controlled by the aforesaid valve, the discharge duct and orifice being surrounded by an integral wall consisting, at the discharge orifice and the wall portion adjacent the latter, of two wall zones the contact edges of which at the discharge orifice are of equal length and abut each other in closed position while, in open position, these contact edges merge with each other under an acute angle, one of these wall zones being elastically flexible and the other rigid; and a beak-shaped closing member having a lip portion and being associated with the actuator head in a manner such that the free end of the lip portion of the closing member rests against the elastically flexible wall zone from the outside of the latter at the discharge orifice, thus pressing the flexible wall zone in the closed position hermetically sealingly against the rigid wall zone.